Originally Posted by speedracerntrixie

Are you talking about the slats that are at the wing leading edge? If so those are supposed to increase lift and lower the stall speed. Depending on where they are placed on the wing they can also be used to force the center of the wing to stall before the outer sections. Personally I would build the airplane without them and twist in some washout ( 1/4" leading edge down ) into the wing while covering provided you are going to use iron on plastic film covering.